Pipe-wrapping machine



Nov. 12, 1929.

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Patented Nov. 12, 1929 UNITED STATES PATENT OFFICE PHILIP D. SHOENBERGER, OF SAN MATEO, CALIFORNIA, ASSIGNOR T0 WESTERN PIPE AND STEEL COMPANY OF CALIFORNIA, OF SAN FRANCISCO, CALIFORNIA, A COR- PORATION OF CALIFORNIA PIPE-WRAPPING MACHINE Application filed February 15, 1927. Serial No. 168,290.

My invention relates to machines for placing a protective covering on pipes and espe- A protective covering is particularly valuable in the case of pipes of large diameter, say of five or six feet, which of themselves are costly and require an ex ensive installation. An

effective covering or pipes is a coating of a bituminous substance, such as tar, overlaid with paper or similar material.

It is. therefore an object of my invention to provide a machine for Wrapping large size pipes.

Another object of my invention is to provide a machine for substantiallysimultaneously coating a wrapping material with a bituminous substance and applying the coated material to a pipe. I

' My invention possesses other advantageous features, some of which with the foregoing, will be set forth at length in the-following description where I shall outline in full that form of the pipe wrapping machine of my invention, which I have selected for illustration in the drawings accompanying and forming part of the present specification. In said drawings I'have shown one form of pipe- Wrapping machine embodying my invention, but it is to be understood that I do not limit myself to such form since the invention, as set forth in the claims, may be embodied in a plurality of forms.

In the drawings:

Fig. 1 is a side elevation of my pipe wrapping machine installed in a factory, various portions of the device being broken away to reduce the size and figure and certain portions of the base being indicated in cross section.

Fig. 2 is a plan of the pipe wrapping machine with portions broken away to reduce Fig. 3 is a cross section of the carria e of the pipe wrapping machine,'t.he plane 0 section being indicated by the line 33 of Fig. 1. Fig. 4 1s a longitudinal'section of the headstock of the machine, the plane of section being indicated by the line 4-4 in Fig. 2.

Fig. 5 is an end elevation of the headstock,

as shown in Fig. 4.

. a Fig. 6 is a cross section of the headstock,

.the plane of section being indicated by the line 6-6 of Fig. 4:.

Fig. 7 is a front elevation of the face plate on the headstock.

Fig. 8 is a cross section of the headstock faceplate, the plane of section being indicated by the line 88 of Fig. 7.

Fig. 9 is a side elevation of the tailstock of my pipe wrapping machine.

Fig. 10 is an end elevation of the tailstock of Flg. 9, with a portion of the adjusting mechanism shown in cross section.

Fig. 11 is a detail view showing in central cross section the face plate of the tailstockr The pipe wrapping machine of my invention preferably comprises a headstock and a tailstockbetween which the pipe to be Wrapped is supported, in combination with a carriage carrying the material for wrapping the-pipe and a substance for treating the wrapping material as it is fed from the carriage to the pipe.

My pipe wrapping machine is for handling large size pipe and is preferably located within a building having a floor or base 6 on which supports 7 are erected to carry a travel ing crane 8 by means of which the pipes are introduced into and removed from the wrapping machine. The'pipe 10 to be wrapped is preferably supported in a horizontal position between a headstock 9 and a tailstock 11- mounted on the base 6. The head stock and the tailstock are preferably relatively movable with the headstock fixed to the base and the tailstock movable on rails 12 restchain passes over a sprocket 20 fixed to a thru shaft 21 journalled in the frame of the tailstock. Also mounted on the thru shaft is a second sprocket 22 engaging a wheel 23 veniently made square.

by means of an intermediate chain 24. The wheel 23 is revoluble by a coaxially disposed handwhcel 26 situated for convenient operation. Uponrotation of the hand wheel 26, the sprocket 19 is rotated and propels the tailstock along the rails 12 by the engagement of the sprocket 20 with the chain 17. Preferably, therails 12 are provided with a series of perforations cooperating with apertured brackets 27 on the frame 13 of the tailstock into both 7 of which pins can be dropped to retain the tailstock rigidly in any predetermined position.

The tailstock end of the pipe 10 rests upon a face plate 29 provided with a plurality ofradially extending triangular jaws 31 adj ustably mounted thereon to receive pipes of various diameters. The face plate is mounted in an anti-friction bearing 32 secured to the end of a center bar supported within the tailstock l1. Thecenter bar is preferably of non-circular cross section and is'con- It is axially slidable within the tailstock and is provided on one face with a rack 34 for engagement with a, pinion 36. Rotation of the pinion propels and retracts the center bar and imparts movement to the face plate along the axis of the pipe. The pinion 36 is affixed to a shaft 37 j ournalled in the tailstock frame 13 and carrying at its outer end a hand wheel 38 by which it is revolved to displace the center bar 33 axially.

In order to increase the operators leverage upon the center bar, the shaft 37 carries a worm wheel 39 engaged by a worm 41 mount- The shaft 42 is ed'on a vertical shaft 42. journalled in a plate 43 secured by fastenings 44 which permit the plate to rock in an arcuate path about a pivot 46 on the frame 13. Guide pins 47 operating in arcuate slots are provided for constraining the motion of the plate 43. The worm 41 and the Wheel 39 can be engaged or disengaged by suitably rocking the plate 43 and alternatively bring into play a suitable hand Wheel 48 at the upper end of the shaft 42.

Vith the described tailstock'arr'angement, pipes of variouslengths and diameters can be accommodated and a precise adjustment of the face plate 29 with respect to its'spacing from the head-stock 9 can be obtained. By suitablerotation of the hand Wheel26, the tailstock is moved approximately to position on the rails 12, is received in place by the pins 28 and the face plate. is subsequent- 1y adjusted exactly by rotation of the hand wheel 38 or the hand wheel 48. The face plate 29 is therefore relatively movable not only with respect to the tailstock 11 but also with respect to the base 6.

Cooperating with the tailstock 11 to support the pipe 10 is the headstock 9. The headstock is stationary on the base 6 and of a center shaft 52 journalled in a headstock housing 53. The face plate 51 preferably comprises a circular disc having a plurality of radially disposed triangular jaws 54 adjustably secured thereto for holding one end of the pipe. The face plate 51 is preferably capable of being driven inone direction of rotation only. The shaft 52 carries a ratchet wheel 56 which is engaged by a plurality of pawls 57 spring-pressed into place- Upon movement of the shaft 52 and the, attached ratchet in a direction counterclockwise in Fig. 7, the pawls 57 are engaged and the face plate is likewise revolved in a counterclockwise direction. Rotation of the shaft and ratchet wheel 56 in a clockwise direction however, frees the face plate and allows the a pinion 64 meshing with a gear 66 keyed to thru shaft 67 journalled at one end in the transverse wall 63 and at the other end in the casing 53.

A sliding gear transmission is provided for varying the ratio of speeds between the shaft 67 and the center shaft 52. The shaft 67 is cut to receive a longitudinal key 68 constraining two clusters of gears to rotate with the shaft but permitting the gears to slide axially. One gear cluster preferably includes a gear 69 adapted-to mesh with a gear 71 on the center shaft 52 and revolve the shaft 52 at considerably" less than the speed of the shaft 67, and a gear 72 which meshes with a gear 73 on the shaft'52 and provides a speed of the shaft 52 only slightly less than the speed of the shaft 67. In the other cluster of gears is a large gear 74 designed to mesh with a smaller gear 76 on the shaft 52 and drive that shaft at av somewhat greater speed than the speed of the shaft 67 and also a gear 77 for meshing with a gear 78 on the shaft comprises a face plate 51 secured to the end 52 and for driving the shaft 52 at a speed I somewhat greater than the speed of the shaft 67. The two gear clusters are suitably spaced on the shaft 67 and are shifted byforks 79 provided with a common handle 81 projecting from the casing 53 at a point for convenient operation. By suitably manipulating the handle 81, four different combinations of gears can be made and three neutral ositions can be hadand the shaft 52 can be riven at a variety of speeds with respect to the speed of rotation of the motor 58. If'desired, the

motor 58 can be varied considerabl in speed so that a'wide range of speed is a oided the face plate 51.

The materials for wrapping and treating the pipe are carried on a carriage 82 which runs on a pair of rails 83 arranged on the base 6 parallel to the axis of the pipe 10. Means are provided for propelling the car to and fro on the rails 83 by means of the source of power 58 and with speeds bearing a relation: ship to the speed of'rotation of the center shaft 52. At each end of the pair of rails, transverse shafts 84 and 86 are provided which carry sprockets 87 engaging a belt 88 which is preferably a link chain. The chain passes around the sprockets 87 and its two ends are secured to opposite ends of the carriage 82. The shaft 86 is extended to a point adjacent the headstock 9. At the extended end of the center shaft 52 a pinion 89 is provided which meshes with an intermediate gear 91 removably mounted on a swinging arm 92 journalled about the center of the shaft 52. Preferably the end of the arm 92 slides in a slot 93 in a hanger 94 secured to the casing 53 and is frictionally retained in place by a screw 96.

It is intended that the pinion 89'and the intermediate gear 91 be removed and replaced by any one of several pairs of gears having different ratios of pitch diameter. The center of the replacing gear is slidably disposed on the arm 92 so that the replacing gear can be meshed with the pinion 89 and also any one 97 of an interchangeable series of gears mounted on a stud shaft 98 journalled in the transverse wall 63 of the headstock casing. Secured to the shaft 98 is a bevel pinion 99 meshing with a second bevel pinion 101 keyed to a shaft 102 journalled in and projecting from the casing 63. The motion of the shaft 102 is transmitted to the shaft 86 by cooperating sprockets 103 and a chain 104. By this connection, the speed of the center shaft 52 bears a predetermined but variable relationship to the speed with which the car 82 is propelled along the track 83. There is thus always a definite ratio between the rate of advance of the carriage and the rate of revolution of the pipe 10. The carriage 82 preferably comprises a framework 106 resting on a pair of stationary axles 107 carrying suitable rail engaging wheels 108 at their outer ends and providing anchorage for the chain 88. Intermediate the height of the framework 106, a support 111 is provided for a roll of paper 112 or other material for wrapping the pipe. The axis of the support is preferably inclined to the axis of the pipe 10 and is non-parallel with the rails 83. The inclination of the roll of material 112 is preferably such that the material feeds readily onto the revolving pipe 10 with the proper pitch. The material of the roll 112 is guided by and overlies an apron 113 extending transversely thru the framework 106 and turned down at its far end to form a lip over which the material readily feeds.

At the top of the framework 106 a tank or container 114 is provided for the substance with which the material 112 is treated. The container is preferably of metal and has a semi-cylindrical bottom and plane sides. It

is provided with a cover 116 suitably operated thru a system of links 117 and levers 118 by a handle 119 conveniently placed for access by the operator. An outlet 121 from the container is disposed at one side of the framework 106 and is controlled by means of a cock 122. The end of the outlet 121 is directly above the lip of the apron 113 and the contents of the container flow from the outlet and dischargeupon the strip of material feeding over the apron.

The substance for treating the material is'. preferably of a bituminous nature, and is usually not sufficient liquid at ordinary temperatures to flow from the container. For that reason, a heatin element 123 is provided for increasing t e temperature of the contents of the container. The heating element is preferably a coil of pipe having perforations 124 therein thru which a fluid fuel can escape for combustion. Theburner is supplied thru a conduit 126 controlled by a cock 127 and connected thru a flexible tube 128 with a source of suitable fuel. The flexibility of the tube 128 is such that the operation of the burner is not interfered with despite the motion of the carriage 82 upon the rails 83. In order toconserve the heat and confine it substantially to the container 114, the upper portion of the framework 106 is enclosed by walls preferably of sheet metal 129 lined with refractory or insulating material such as fire brick 131. Air to support the combustion at the burner 123 is admitted thru an aperture 132 adjacent the outlet 121 and the products of combustion are free to escape thru vent holes 133 adjacent the top of the container 114.

Although the capacity of the container 114 is considerable, means are provided for replenishing it as becomes necessary. At one end of the rails 83 and preferably adjacent one of the supports 7, have provided an elevated tank 134 in'which a reserve quantity of treating substance can be retained. The tank 134 is preferably at a suflicient height above the base so that material it contains can be gravitally discharged thru a pipe 136 into the container 114. The reserve treating substancewithin the tank 134 can be conveniently kept hot and in a liquid condition by fluid coils 137 supplied thru conduits 138 with hot fluid from a suitable source. Preferably, an elevator 138 is installed at one side of the tank 134 for raising the treating substance, from the level of the base 6 up to the top of I the tank 134 into which it is discharged and heated.

In the operation of my pipe wrapping machine the crane 8 is traversed to bring the pipe 10 into position between the face plate 29 of the tailstock 11 and the face plate 51 of the headstock 9. The pipe is secured between the jaws 31 and 54: on the two face plates by moving the tailstock toward the headstock in response to motion of the hand wheel 26. Final adjustment is made by propelling or retracting the center bar 83 of the tailstock until the pipe is firmly held. When the pipe is in position, the electric motor 58 is energized by means of a controller 141 mounted at one side of the headstock and suitable gears of the transmission 69 are enmeshed. The

center shaft 52 is thereby revolved and the pipe is rotated about its central axis. The carriage 82 carrying the pipe wrapping material is advanced at a rate corresponding to the speed of rotation of the pipe by a suitable combination of intermediate gear 91 and pinion 89.

As the pipe 10 is initially revolved, the material, such as paper, from the roll 112 on the carriage 82 is fed over the apron 113 and starts to wrap around the pipe. At the same time, the cock 122 is opened and a stream'of the liquid, treating substance from the container 114 falls gravitally onto the material passing over the apron. The bituminous treating substance is not only a preservative but is alsoadhesive and the treated paper adheres to the pipe as the pipe revolves.

The paper is wound about the pipe with an intermediate layer of bituminous sub stance in a spiral until the entire length of pipe has been wrapped. The flow of treatmg substance from the tank 114: is then cut off and the paper is severed. The drive motor 58 is reversed, which brings the carriage back to its initial starting position, but inasmuch as the face plate 51 is driven thru a ratchet device, it is not rotated in a reverse direction and while the carriage is being returned to its initial position, the face plates 51 and 29 are stationary and the tailstock is retracted to permit the crane to lift the pipe from the machine. Another pipe is then sub I stituted for the first pipe and the process repeated. When the container 114 becomes empty, it is run to the end of the rails 83 and the pipe 136 connected to the tank 134: is

. swung into position and the container 114 is replenished.

I claim: J,

1. A pipe wrapping machine comprising means for rotating a pipe about an axis, means movable parallel to said axis for feeding a wrapping material onto said pipe, means for driving said rotating means and said movable means at a predetermined speed ratio, and means rendering .said driving means efiective on said rotating means in only one direction of rotation.

2. A pipe wrapping machine comprising means for rotating a pipe about an axis, a reversible driving means, means connecting said driving means and said rotating means for one direction of rotation only, a pair of rails parallel to said axis, a carriage adapted to run on said rails, and means for driving said carriage to and fro on said rails by said driving means.

3. A pipe wrapping machine comprising a base, a tailstock movable on said base, a headstock afiixed to said base, reversible driving means, a faceplate on said headstock adapted to be driven in one direction only by said driving means, a carriage adapted to run to and fro on said base, means for connecting said carriage to said driving means, wrapping material on said carriage adapted to be fed to a pipe held by said headstock and said tailstock, means for gravitally feeding a treating substance to said wrapping material, and means for gravitally replenishing said feeding means.

4. A pipe wrapping machine comprising a base, a tailstock movable on said base and means for moving said tailstock comprising a chain secured to said base, and a sprocket journaled in said tailstock and engaging said chain.

v 5. A pipe wrapping machine comprising a base, a pair of rails on said base, a tailstock 7 adapted to run on said rails, a chain extending along said rails and secured to said base, and a sprocket journaled in said tailstock and engaging said chain.

. 6. A pipe wrapping machine comprising a base, a pair of rails on said base, a tailstock adapted to run on said rails, a chain intermediate said rails and aflixed at both its ends to said base, a pair of sprockets on said tailstock under which said chain passes, a sprocket journaled in said tailstock over which said chain passes, and a hand wheel for rotating said last-named sprocket.

7. A pipe wrapping machine including a tailstock comprising a center bar having a rack thereon, a pinion engaging said rack, means for rotating said pinion to propel and retract said bar, and a faceplate revolubly mounted on one end of said bar.

8. A pipe wrapping machine comprising a base, rails on said base, a-tailstock adapted to run on said rails, means including a sprocket on said tailstock engaging a chain afiixed to said base for moving said tailstock with respect to said base, a faceplate rotatable with respect to said tailstock, and means including an axially translatable non-rotatable center bar for propelling and retracting said rotatable faceplate with respect to said tailstock and to said base.

base, a pair of rails on said base, a carriage 

